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Summary of Contents for Sensortechnik Meinsberg LF 39
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Page 1: Operating Instructions
Edition July 2002 Operating instructions Meinsberg Conductivity Meter LF 39 Sensortechnik Meinsberg GmbH Fabrikstraße 69, OT Meinsberg Phone : + 49 34327 623-0 D-04720 Ziegra-Knobelsdorf : + 49 34327 623-79... -
Page 2: Safety Guidelines
To disconnect the temperature sensor do not pull the cable, but use the plug. Ensure to connect plug and socket in the right direction; you do not need high force for connection. d.) Operation with Power Supply LF 39-N: Use the plug mains supply unit N 10 from the manufacturer only. -
Page 3: Table Of Contents
- 2 - Contents Application Construction 2.1. Conductivity Cell 2.2. Conductivity Meter Operation 3.1. Putting into operation 3.2. Selection of the measuring parameters 3.3. Selection of the measuring ranges 3.4. Storage of the maximum and minimum values 3.5. Operation mode (configuration menu) 3.6. -
Page 4: Application
- 3 - Application The model LF 39 is ideal for lab, field and industrial work. The meter features high accuracy, rugged plastic case, microprocessor-controlled processing and a wide range of application in conjunction with the conductivity cell with graphite electrodes and built-in temperature probe. -
Page 5: Operation
('HLD' in display) Set/menu: confirmation of input; return to measurement Sockets Interface: Connection of the isolated interface adapter (LF 39- D only) Measuring Cell: Cable gland for fixed cable connection Operation 3.1. Putting into operation... -
Page 6: Selection Of The Measuring Parameters
Calculation of the total dissolved solids (TDS) in mg/l SAL : Calculation of the salinity 3.3. Selection of the measuring ranges The LF 39 features conductivity measurement in four different ranges. 200.0 µS/cm 2000 µS/cm 0.00 20.00 mS/cm 200.0 mS/cm... -
Page 7: Operation Mode (Configuration Menu)
- 6 - Menu With a momentary press on the key it is possible to change between the maximum and minimum values of the single measuring parameters (look at point 3.2. Selection of the measuring parameters). Obvious this function is given also for measuring parameters which were not activated during the measurement. - Page 8 - 7 - ‘t.rEF’: Selection of the reference temperature 20 °C : reference temperature 20 °C 25 °C : reference temperature 25 °C ‘C.tdS’: Adjustment of the determined TDS-factor 0.40..1.00 : TDS-factor The TDS-factor depends from the composition of the measured medium.
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Page 9: Measurement
3.6. Measurement LF 39 works in the selected operation mode (look at point 3.2. Selection of the measuring parameters). Immerse the conductivity cell into measuring solution and wait until the measurement value is stabil. Pay attention to efficient mixture of the measuring solution and temperature equilibrium. - Page 10 For routine measurements it is sufficient to observe a tolerance of ± 0.5 K. Set the LF 39 into operation, select the operation mode (measuring parameter) conductivity measurement mS or µS without temperature compensation, adjust the reference temperature 25 °C and use the lowest measuring range in accordance with the used standard solution (look at point 3.5.) ;...
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Page 11: Trouble Shooting
- 10 - 4. Trouble Shooting Error message Cause Action battery nearly discharged, operation change battery will be possible only for a short time - battery discharged change battery - damaged mains supply unit change mains supply unit, if error is not removed ->... -
Page 12: Technical Data
Storage temperature (instrument) - 20 ... 70 °C Power supply 9 V battery type IEC 6F 22 LF 39-N: additionally with mains supply unit Interface LF 39-D: additionally with isolated interface adapter (optional accessory) for RS-232 connection to a PC in accordance with regulation 89/336/EWG (additional fault <... -
Page 13: Delivery Volume, Accessories And Special Versions
6.3. Special versions LF 39-N : In addition to battery operation the LF 39 can be connected via special mains socket (internal pin ∅ 1.9 mm) to the plug mains supply unit N 10. Use the plug mains supply unit N 10 from the manufacturer only.
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